Thomas flin



THOMAS AFLlNiL-OF, BROOKLYN, ANEW FORK.'

LetterePatent No. '77,809, dated .May 12, 1868.

' IMPROVEMENT IN WATER-NDIGATORS AND AIARMS.

die Soehnle' ruimt niu ilona teiiiis ntmt mit mating part nt titane.

TO ALL WHOM Il' MAY CONCERN:

Be it known that LTnonms FLINN, of Brooklyn, in the county of Kings, and State of New York, have invented a new and improved Waterlndicator., and Alarm-Attachment; and I do hereby declare that the folf lowing is a full, clear, and exact description' thereof, which will eniible othersskilled inthe art to make and use the same, reference being had to the accompanying drawings, forming partof this `speeicatiou, in which- Figure 1-represents a side elevationof my improved water-indicator.'

Figure 2 is a vertical section of the same. 4

Similar letters of reference indicate corresponding parts.

This invention relates to a new devicefor indicating the heightofvwater in steamboilcrs, and Afor sounding" an alarm if. the quantity-of,u'atersl1ould rise or fall in the boiler beyond the required limits.

l*Ihe invention consists in the use and combination of acylindiicalvessel, which is screwedk or otherwise secured upon theboiler, with a rod, 'which is supported by a float above-the water', and which fits into the cylin.-

drical attachment', havinga pin, `by means oir which the height of. the water will be indicated on a. graduated scalefarranged on the cylindrical vessel,

' 'In thetubular upper end `of the rod plays the lower part of another rod, which`isI suspended from a valvej f that keeps the steam from a whistle, arranged'in the upper par-trof the cylinder. If the water falls below a.

certainlevel, a shoulder on the end of the. oating rodfwill press upon a shoulder on the lower end of the suspended rod, and will thereby draw the latter, and with it the valve, down, opening the way for the steam tothewhistle. If the water'rlses above a certain desired level, the shoulder on the upper en d will strike against a shoulder on thesuspended rod, and will thus raise the latter. The upper Vend ofthe suspended rod will thereby be pushed against a lever, which is pivoted to the cylindrical vessels, and which is connected with the valve to the whistle, so that when one endof the lever is raised by the rod', the other end will be lowered, and will lower the valve, thereby giving the steam access to the whistle. Thus, if the water is too high or too low, will the alarm be sounded through the samewhistle.

A, in' the drawing, represents a tube or cylindrical vessel, 'screwed or otherwise fastened upon a boiler, of

. whicha section is indicated by red lines in Vthe drawing. The tube is inade of metal or other suitable material, v.and may, if desired, have a section, a, of glass, 4or other transparent, substance, put into it, so as to allow the inspection of the interior. 1 The upper end of the tube is covered bya perforated cover, the channel b of whichy is closed from thc under side by means of a plug-valve, B, which 4is pressed against itsseat bythe steam enterL ing the vessclA, vand by the weight of the lever H. t

' Above the channel b' ismounted, upon the tube A, a stcamf'whstle, C, which, asy soon as the valve Bis opened, is sounded by the steam whichrpasses through the tube A. v

' A float, D, swimming on thewater in the boiler, supports a ro'd, E,which fits into the tube, as shown.A This rod is either tubular and perforated, as shown, or it is off such small diameter that the steam can freely pass' from the boiler into the tube A. If the rod E is tubular, its upper end fits around another rod, F, which is suspendedvfrom a lever, G, pivoted tothe upper part of the tube A, said lever passing through thevalve B,

as shown.

AIi the water is too low in the boiler, the iioat will sink, and the upper end,c, of the rod E will strike v against a shoulder,d, on the rod F, and will draw the latter down, so that. the lever G will be drawn down,

thereby lowering 4the valve B.

' If the-water is too high in the boiler, the cud, c, oi' the rod E strikesiagainst a shoulder, e, on the rod F, and

pushes the latter up. The upper` end of the rod F is thus pushed against a lever,iH, which has its fulcrum neat' its middle, in the stationary tube A, whilcits other end is ittedinto the valve B, and thus as its oneend is raised, the other end is lowered, and lowers the valve oii'.its,`scat; The valve is thus opened both by the raising and lowering of the r'od'F. lIi' the rod E is not tubular', then the rod F should beso, andlthen the shoulders l d, he., should be o n E, and the closed end on F.

By having a pin,'j`, or other indicator, on the rod E, the height of the iv'nter in the boiler would be indicated on a graduated scale, which' is provided on the tube A, as shown in`iig. 1.

Theinvention may also'be connected wthan ordinary 'Water-gauge, if desired. It will be noticed thatthe gauge or index is thus operated without friction. n

Having described uiy invention, I' claim es new, and desire to secure by'LettersPatent- 1. The arrangement of therods E and' F, .connected so thattho upper suspended rod, F, will only be operated by the lower floating rod, when the water in the boiler is at too high or` too low a level, substanti'ally'as herein shown and described.

2. The rod F, when operated as described, in combinationwith the levers G H and with the valve B, all made and operating so that the valve will be opened both ivhen thc rod F is raised and when it is lowered, ds

set forth. Y

3. The above,/in combina-tion with the pin f, or other indicator on the oating-rod E, whereby the appa.-

ratus is provided with an index, as set forth.

THOMAS FLINN.

' Witnesses: v

WM.4 F. vMcliliiliuinn, ALEX. F. ROBERTS. 

